Okay - I had to look this up. It's a Soviet entertainer. Here's the scoop.

"Khil, a fine baritone, is shown crooning a wordless but catchy little tune titled, "I'm so happy to be finally back home," while strolling and gesturing dramatically amid a bizarre backdrop of ornate metallic constructions.

On the phone, he explained that the reason the iconic song has no lyrics is that the original ones, about a cowboy riding the range while his wife sits at home knitting socks, were banned as "too naughty" by Soviet censors of the day.

"A theme like that was unacceptable, so we decided to sing it without any words at all," he said. "So, in this case, I was an instrument rather than a singer."